The amount of gold held at Fort Knox has fluctuated over the years. It was at its greatest amount during World War II when several European governments moved their gold reserves to Kentucky for safe keeping. At this time, the amount of gold at Fort Knox peaked at 20,205 metric tons (650 million oz. troy).
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Sheldon with an engagement ring in The big bang theory season 8. The Big Bang Theory season 8 finale ended on a cliffhanger, where Amy breaks up with Sheldon, but it turned out that he was planning to propose to her. Meanwhile, Penny and Leonard are off to Las Vegas to get married, when Leonard tells his fiance that he made out with a girl while he was out on The North Sea.